Optical Method and Device for the Detection and Enumeration of Microorganisms
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United States of America Patent
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Issued Date -
Jun 26, 2014
app pub date -
Oct 15, 2013
filing date -
Nov 10, 2006
priority date (Note) -
Abandoned
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Abstract
A new device and method for detecting the presence of living microorganisms in test samples are described. The device comprises a container with at least one section transparent to light, a growth zone located in said container containing a mixture of growth media capable of supporting growth of the microorganisms, and at least one indicator substrate that changes its optical properties due to growth of the microorganisms. A detection zone is located in the container adjacent to the transparent section, and a barrier layer comprising porous solid material separates the two zones, allowing diffusion of molecules and ions of metabolic by-products of the organisms, while preventing microorganisms and particulate matter of the test sample from penetrating into the detection zone.
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